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Astigmatism is a refractive error that occurs as a result of the eye’s inability to form a single point of focus on the retina, due to an irregular curvature of the surface of the cornea or lens. The answer to the question, “What causes astigmatism in the eye?” is that irregularities or curvatures on the surface of the cornea lead to astigmatism. Astigmatism can cause blurry or distorted vision at both near and far distances. In response to the question “What is astigmatism and what causes it?”, astigmatism can be congenital or can also develop as a sequela of surgical interventions, corneal injuries, or diseases.
The question “What is astigmatism in the eye?” is frequently asked. Individuals with astigmatism may experience symptoms such as ghosting around light sources, double lines at the edges of shapes, double vision, and glare from lights during night vision. The answer to “How is astigmatism diagnosed?” is through a detailed eye examination and an astigmatism test. If signs of astigmatism are noticed during routine eye checks, the use of eyeglasses or contact lenses can be initiated.
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Is Astigmatism Genetic?
Astigmatism is known to be genetic. Individuals with a family history of astigmatism have a higher risk of developing this refractive error. In addition, environmental factors may also play a role in the formation of astigmatism.
How Does a Person with Astigmatism See?
Individuals with astigmatism see objects at both near and far distances as blurry or distorted. This is caused by the irregular curvature of the cornea or lens, which prevents light from being focused properly on the retina. As a result, the shapes of objects may be perceived as elongated or scattered.
People with astigmatism may see halos or glare around lights. Especially when driving at night or in low-light conditions, they may notice glare or starburst patterns around light sources.
Furthermore, individuals with astigmatism often feel the need to squint their eyes to obtain a clear image. This constant effort can lead to eye strain (asthenopia) and headaches. Discomfort may increase after activities requiring prolonged focus, such as reading or computer use.
The symptoms of astigmatism can vary from person to person, but common symptoms include blurry or distorted vision, eye strain, headaches, and difficulty with night vision. Astigmatism is the refractive error most frequently responsible for headaches. It is recommended that individuals experiencing these symptoms consult an ophthalmologist.
What are the Symptoms of Astigmatism?
The following symptoms may be observed in individuals with astigmatism:
- Blurry or distorted vision
- Eye strain and headaches
- Squinting to see clearly
- Difficulty with night vision
- Light sensitivity and halos
What Causes Astigmatism?
Astigmatism is generally caused by an irregular curvature of the cornea or the crystalline lens. This prevents light from focusing correctly on the retina, leading to blurred vision. Astigmatism can be congenital or can develop after eye injuries or surgical procedures.
Does Astigmatism Cause Headaches?
Yes, astigmatism can cause headaches. Individuals who constantly experience blurry vision may feel headaches because they strain their eyes excessively. Activities such as reading for long periods or working in front of a screen can lead to eye strain and consequently, headaches.
Astigmatism Treatment
Astigmatism can progress over time. Astigmatism that begins in childhood can progress due to changes in the eye’s structure. Therefore, the course of astigmatism should be monitored with regular eye examinations. Various methods are applied in the treatment of astigmatism, depending on the degree of the patient’s visual impairment and lifestyle:
Eyeglass and Contact Lens Therapy
- Eyeglasses: This is the most common and easily accessible method for correcting astigmatism. Cylindrical lenses, specially designed for individuals with astigmatism, provide clear vision by ensuring that light is focused correctly on the retina.
- Contact Lenses: Contact lenses can offer a wider field of view and, in some cases, clearer vision than eyeglasses. Special soft lenses called toric lenses are used to correct astigmatism. These lenses also allow for the correction of other refractive errors such as myopia and hyperopia. Additionally, in cases of advanced or irregular astigmatism, scleral lenses or hybrid lenses are used.
Laser Treatment for Astigmatism
Laser surgery methods can also be applied for the permanent correction of astigmatism. These methods aim to reshape the cornea, ensuring that light focuses correctly on the retina. The most common laser treatment methods are:
- LASIK (Laser-Assisted in Situ Keratomileusis): In this method, a thin flap is created on the surface of the cornea, and the underlying tissue is reshaped with a laser. LASIK is known for its rapid recovery time and minimal discomfort.
- PRK (Photorefractive Keratectomy): The laser is applied under the epithelium on the surface layer of the cornea. PRK is preferred for patients with thin corneas or those who are not suitable candidates for LASIK. The recovery period is slightly longer than that of LASIK.
- SMILE (Small Incision Lenticule Extraction): In this newer method, a lens-like piece of tissue is removed through a small incision in the cornea, reshaping it. SMILE is a minimally invasive procedure, offering a faster recovery and a lower risk of complications.
Laser treatments are generally suitable for individuals who are over 21 years of age and whose prescription has stabilized. As with any surgical procedure, laser treatment for astigmatism may have risks and side effects. Therefore, a detailed eye examination and a doctor’s evaluation are necessary to determine suitable candidates.
The choice of treatment method for astigmatism is determined by the doctor, taking into account the patient’s eye structure, lifestyle, and personal preferences. Regular eye check-ups and adherence to the doctor’s recommendations are critical for the success of the treatment.
Astigmatism is a refractive error that can also be seen in children and infants, and its early diagnosis is of great importance for the child’s visual development and overall quality of life.
Astigmatism Exercises
Eye exercises aim to strengthen the eye muscles and reduce eye strain. However, there is no scientific evidence that they are effective in completely correcting astigmatism. These exercises can be used more for supporting eye health. For example, the “20-20-20” rule is recommended for those who work in front of a screen for long periods: looking at an object about 20 feet (6 meters) away for 20 seconds every 20 minutes can help the eyes rest.
Natural Methods
It is not possible for astigmatism to be completely corrected through natural means. However, the following measures can be taken to support eye health:
- Nutrition: Consuming foods rich in vitamins A, C, and E, as well as omega-3 fatty acids, can support eye health. For example, foods like carrots, spinach, oranges, strawberries, eggs, and avocados are beneficial.
- Resting the Eyes: Taking regular breaks during activities that require prolonged focus can reduce eye strain.
Astigmatism in Children
In children, astigmatism is often noticed during the school years. It can manifest with symptoms such as difficulty seeing the blackboard clearly, struggling while reading, and headaches. This can negatively affect the child’s academic performance and daily activities. Since children may not be able to express their vision problems, it is important for parents and teachers to pay attention to these signs. Regular eye examinations are critically important for the early diagnosis of astigmatism. Eye check-ups, especially at ages 1-2, allow for the timely detection of visual impairments like astigmatism and reduce the risk of amblyopia (lazy eye).
Does Astigmatism in Infants Correct Itself?
Mild astigmatism in infants can often correct itself spontaneously. Especially in children younger than 5 years old, astigmatism of up to 2 diopters may be considered normal, and glasses may not be prescribed. However, each case is individual and requires a detailed evaluation. Early diagnosis and treatment of high-degree astigmatism are important. If left untreated, astigmatism can lead to amblyopia. Therefore, it is recommended that infants and young children undergo regular eye examinations. The negative effects of astigmatism can be minimized with early diagnosis and appropriate treatment.
Parents should not neglect eye examinations at the recommended ages to protect their children’s visual health and should consult an ophthalmologist if they have any suspicions.
Regular eye examinations are of great importance for the diagnosis and treatment of astigmatism and other eye conditions. Visual impairments can affect daily quality of life and may progress if not diagnosed early. If you are experiencing symptoms of astigmatism, it is recommended that you consult an ophthalmologist and schedule an appointment as soon as possible. Additionally, you can check the relevant disease pages to learn more about Eye Diseases, Myopia, and Hyperopia. Do not forget to follow expert recommendations to protect your eye health.
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